Yeah, this relative was born in the teens. The nineteen teens.
His mother should have taken care to see he got mumps when he was little.
Good mothers did that with the ‘childhood’ diseases back then. Still not risk free but WAY less risk overall.
My own hubby had chickenpox at 40. No serious effects fortunately. But it was all the evil dwarves living at my house at once. Itchy, bitchy, surly, snarky, feverish...
And grown men are such good patients.